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A carnot engine operates between reservoirs whose temperatures are650K and 350K. To improve the efficiency of the engine, it isdecided either to raise the temperature of the hot reservoir by 40K or to lower the temperature of the cold reservoir by 40 K. Which change gives the greatest improvement? Justify your answer bycalculating the efficiency in each case.
A particle of mass, m, trapped in a 1-d box of length, L,has energies with: En = (h^2 pi^2/ 2mL2) x n^2, What type of radiation is this
The amount of charge that passes through the filament of a certain lightbulb in 2.00 s is 1.67C. find the current in the lightbulb
A dipole is located at the origin, and is composed of charged particles with charge +e and -e, separated by a distance 9 10-10 m along the y axis
What is linear acceleration
For a particular scientific experiment, it is important to be completely isolated from any magnetic field, including the earth's field. What is the current in the current loop
A ball is dropped from rest at the top of a 6.10 m tallbuilding, falls straight downward and collides inelastically withthe ground, and bounces back. How many bounces can the ball make and still reach a windowsill that is2.38 m above the ground
If the rock falls from the cliff into a pool containing 7.00m3 of water at 16.3%u2218C, what is the final temperature of the rock-water system
A copper wire of length L and cross sectional area A is connected to a 12.0 volt DC power supply. The current through the wire is measured at 36A. What is the current through both wires
The figure below shows a hollow cylinder that has a length equal to 1.80 m, a mass M equal to 0.88 kg, and radius equal to 0.20 m. The cylinder is free to rotate about a vertical axis that passes through its center and is perpendicular to the cylinde..
A cat dozes on a stationary merry-go-round, at a radius of 5.4 m from the center of the ride. Then the operator turns on the ride and brings it up to its proper turning rate of one complete rotation every 6.2 s
A 12.0 g bullet is fired horizontally into a 100 g woodenblock that is initially at rest on a frictionless horizontalsurface and connected to a spring having spring constant 150 N/m. what was thespeed of the bullet at impact with the block
A series RLC circuit has R = 50 %uF057, L = 2.7 %uF06DH, and C = 52 nF. find the rms amplitude of the current flowing through the circuit
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